finals quiz 1

A type of solid that is characterized by a lack of well-defined arrangement and long-range molecular order.

• amorphous solid

• crystalline solid

• molecular solid

It is the basic repeating structural unit of a crystalline solid.

• unit cell

• lattice point

• lattice structure

• crystals

True or False. All seven crystal systems are characterized by sides and angles between sides that are equal to each other.

• True

• False

The crystal system that is characterized by sides and angles between sides that are equal to each other.

• simple cubic

• tetrahedral

• rhombohedral

• hexagonal

True or False. The larger the coordination number, the tighter the atoms are packed together.

• True

• False

The coordination number for the simple cubic cell is _____.

• 4

• 6

• 8

• 12

The number of atoms per unit cell for a body-centered cubic crystal structure is _______

• 2

• 9

• 4

• 8

The type of crystal wherein each lattice point is occupied by a molecule

• molecular crystal

• ionic crystal

• covalent network crystal

• metallic crystal

The covalent crystals are crystals in which lattice points are occupied by

• non-metals

• metal and non-metal

• molecules

• metallic atoms

The type of crystal that is a poor conductor of electricity when solid but good conductor when molten or in aqueous solutions.

• ionic crystal

• covalent crystal

• molecular crystal

• metallic crystal